CN113969579A - Multistage expansion utricule stock device - Google Patents

Abstract

The invention provides a multistage expansion capsule anchor rod device, which solves the problems of poor anchor rod effect and even failure caused by insufficient anchor rod stress points and easy damage of the stress points of a locking section in the prior art. The scheme is, anchor end axial outside interval arrangement has a plurality of round platform bodies of big end inside out along the axial, round platform body axial inner end coaxial coupling has the tension body, round platform body axial outer end opens the hole that passes through the tension body of axial inward penetration, and the tension body of axial innermost is fixed on anchor end, and the tension body of axial outside passes the hole that passes in its axial inboard adjacent round platform body and the tension body and fixes on anchor end, the sleeve pipe of lower extreme slip cap on the tension body is gone up to the internal cover of round platform body, the sleeve pipe axial outer end is opened has the fluting of multistage towards the axial inboard extension. The invention effectively increases the anchoring effect of the anchor rod stress body and the multi-section rock-soil body in the anchor hole.

Description

Multistage expansion utricule stock device

Technical Field

The invention relates to an anchor rod, in particular to a multi-stage expansion capsule anchor rod device.

Background

The anchor rod is widely applied to slope treatment engineering and mainly used for controlling surface engineering such as slopes and deep foundation pits and underground chambers such as tunnels and stopes.

In some surrounding rocks with lower grades, such as in soft rock areas, the surrounding rocks are prone to large deformation, and under the action of earthquakes, some surrounding rocks are prone to large deformation. Large deformation factors, loads and the like are generated, and anchor rods are most widely used as surrounding rock supporting structures in work.

The rigid anchor rod in the prior art is mainly only used for directly anchoring one end of the anchor rod at the bottom of an anchor hole, and then a tray is pressed on the outer side surface of a side slope through a nut screwed on the anchor rod. The external stress point is exposed outside and is exposed to wind and sunlight in a wild environment, so that the nut and the tray are rusted after being used for a long time, the mechanical property of the nut and the tray is damaged, and in addition, the outer side surface of the side slope is easy to crack after being stressed for a long time, so that the anchor rod cannot achieve the required control on the deformation of the side slope and even fails. In addition, because the anchor hole is deep, the deformation between the anchoring end and the outer side surface of the side slope can occur in different depths, and the traditional anchor rod needs external nuts and trays to bear force no matter the deformation is in any depth, so that the anchoring failure is easily caused after long-term use. The stress of the anchor rod structure is not only from the anchoring end and the outer end of the anchor rod, but also from a plurality of sections of anchoring sections and a plurality of sections of self-expansion anchoring.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the multi-stage expansion capsule anchor rod device, which effectively solves the problems that the anchor rod in the prior art has poor effect and even fails because the stress point of the locking section is easy to damage.

The technical proposal for solving the problem is that the multistage expansion capsule body anchor rod device comprises an anchoring end and is characterized in that, a plurality of truncated cone bodies with large axial outside and small axial inside are arranged at intervals at the axial outside of the anchoring end, a tension body is coaxially connected at the axial inner end of the truncated cone body, the axial outer end of the round table body is provided with a through hole which axially penetrates through the tension body inwards, the tension body at the innermost end in the axial direction is fixed on the anchoring end, the tension body at the axial outer side is fixed on the anchoring end through the round table body adjacent to the axial inner side and the through hole in the tension body, the axial inner part of the circular truncated cone is sleeved with a sleeve with the axial inner end slidably sleeved on the tension body, the axial outer end of the sleeve is provided with a plurality of slots extending towards the axial inner part, a plurality of first elastic bodies are connected between the sleeve with the axial innermost end and the anchoring end, and a plurality of second elastic bodies are connected between the rest sleeves and the circular truncated cone on the axial inner side;

the utility model discloses a construction method, including the anchor hole, the anchor hole is fixed with the annular first elasticity utricule, the annular first slip casting pipe that has the anchor hole, the annular first slip casting pipe that has the other end to stretch out outside the anchor hole is fixed with the annular first slip casting chamber that covers on the first slip casting hole to the annular radial inboard of sleeve pipe, the radial outside of sleeve pipe is fixed with the annular first elasticity utricule that covers on first slip casting hole, the downthehole annular first holding tank that has corresponding with first elasticity utricule that opens of anchor.

Preferably, the anchoring end comprises a cylinder, a grouting chamber is arranged in the cylinder, a plurality of second grouting holes communicated with the grouting chamber are formed in the outer circular surface of the cylinder, an annular second elastic bag body covering the second grouting holes is fixed on the outer circular surface of the cylinder, an annular second accommodating groove corresponding to the second elastic bag body is formed in the anchoring hole, and the grouting chamber is communicated with a second grouting pipe with the other end extending out of the anchoring hole.

Preferably, the sleeve on the axial inner part of the first elastic balloon is sleeved with the grouting guide disc.

Preferably, the anchoring end center is fixed with the screw rod, the screw rod passes the interior hole that passes of the round platform body of axial outermost end towards the axial outside, the partial cover that the screw rod passes the round platform body of axial outermost end has the tray, the screw rod of tray axial outside is screwed on and is twisted there is the nut.

Preferably, the anchoring end is anchored at the axially innermost end of the anchoring hole, the side wall of the sleeve on the axially inner side of the slot is anchored in the anchoring hole, and the inner wall of the anchoring hole at the slot is attached to the sleeve.

Preferably, the first elastic body and the second elastic body are both springs.

Preferably, the truncated cone and the tension body are of an integral structure.

Preferably, the tension bodies other than the tension body at the innermost axial end each include an insertion portion inserted through the hole, and a transition portion integrally connected to an axially outer end of the insertion portion, the axially outer end surface diameter of the transition portion is equal to the axially outer end diameter of the tension body at the innermost axial end, and the axially outer end of the transition portion is connected to the truncated cone.

Preferably, the transition part is in a circular truncated cone shape with a small inner part and a large outer part in the axial direction.

The invention has the beneficial effects that: 1. when the side slope is deformed, the deformation monitoring device can be controlled in a segmented mode, only the sleeve at the axial outer end of the deformation position and the tension body matched with the sleeve are stressed, and the tension body at the axial inner side of the deformation position is not stressed, so that the service life of the anchoring device can be prolonged, the side slopes at different positions can be conveniently detected, and the deformation of the side slope at which position is the deformation monitoring position can be monitored.

2. When the side slope is deformed, the stress points are acted on the tension body and the anchoring end, the stress is carried out in the anchor hole, the anchor hole is not eroded by the long-term external environment, the service life of the anchoring device is prolonged, and the anchoring effect is improved.

3. When the side slope is deformed, the inner wall of the anchor hole is provided with the sleeve at the corresponding position to axially move outwards, the outer end of the sleeve axially consists of a plurality of arc parts (because the outer end of the sleeve is provided with a plurality of slots) which have certain elasticity, the upper part of the sleeve axially moves outwards on the cone body, the cone body forces the sleeve to continuously open axially outwards, the friction force between the sleeve and the anchor hole is continuously increased due to the fact that the inner diameter of the sleeve is enlarged after the sleeve is opened, the sleeve firmly props against the side wall of the anchor hole, and the fixing position of the sleeve on the side wall of the anchor hole, the tension body and the fixing point of the tension body at the fixing end of the sleeve form anchoring to the side slope. The axial outer end stress part utilizes the friction force of the sleeve and the anchor hole, the friction force is in circumferential surface contact, and the friction force is continuously increased along with the axial outward movement of the sleeve. The adaptability is wide.

4. The main engineering technical problem solved by the invention is that after the side slope is acted by external force, the sleeve at the corresponding position in the anchor hole moves outwards along the axial direction, so that enough anchoring force is generated between the anchor rod stress body and the rock soil body in the anchor hole, the first elastic bag body expands into the corresponding first accommodating groove in a grouting manner, and the grouting is stopped after the first accommodating groove and the annular grouting cavity are filled. This kind of anchor mode fills the anchor thick liquid into in the anchor eye lateral wall presets the cavity and the sleeve pipe for the first holding tank of anchor eye lateral wall and the intraductal cyclic annular grouting chamber of sleeve pipe form a complete anchor structure, thereby greatly increased the anchor power of sleeve pipe and anchor eye lateral wall, utilize the expansion characteristic of elasticity utricule ingeniously, not only can pour into the cavity that the anchor eye lateral wall set up with the concrete conveniently, thereby prevent that the concrete from flowing wantonly and making peripheral ground body receive the influence, maneuverability is strong, construction convenience.

5. According to the anchoring mode, the first elastic bag body expands to enter the corresponding first accommodating groove, and grouting is stopped when the second accommodating groove and the grouting chamber are filled. This kind of anchor mode fills the thick liquid into in the anchor eye lateral wall and the cylinder for the second holding tank in the anchor eye and the slip casting room in the cylinder form an integral structure through the concrete, greatly increases the anchor effect of stock, and this structure has designed the elasticity utricule ingeniously, and pours into the cavity of predetermineeing in the anchor eye lateral wall into with the concrete with the direction, thereby prevents effectively that the concrete from flowing wantonly and leading to peripheral ground body to receive the disturbance, and maneuverability is strong, construction convenience.

Drawings

FIG. 1 is a front view of the present invention.

Fig. 2 is a sectional view taken along line a-a in fig. 1 (with the grout tube removed).

Fig. 3 is an enlarged view of the portion B of fig. 2 (with the injection tube removed).

FIG. 4 is a perspective view of the present invention.

FIG. 5 is a perspective view of the present invention.

Fig. 6 is a perspective view of the cannula of the present invention.

Fig. 7 is a perspective view of a first stage tensioner of the present invention.

Fig. 8 is a perspective view of a second stage tensioner of the present invention.

Fig. 9 is a block diagram of the present invention installed in an anchor hole.

Fig. 10 is a partial cross-sectional perspective view taken along line a-a of fig. 1 (with the grout tube removed).

Detailed Description

The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings 1 to 10.

Embodiment 1, the technical solution is that, a multistage inflatable balloon anchor device, including an anchoring end 1, characterized in that a plurality of truncated cone bodies 2 with large axial outside and small axial inside are arranged at intervals on the axial outside of the anchoring end 1, a tension body 3 is coaxially connected to the axial inside of the truncated cone body 2, a through hole 4 axially penetrating the tension body 3 inwards is opened on the axial outside end of the truncated cone body 2, the tension body 3 at the axial innermost end is fixed on the anchoring end 1, the tension body 3 at the axial outside is fixed on the anchoring end 1 through the adjacent truncated cone bodies 2 and the through hole 4 in the tension body 3 at the axial inside, a sleeve 5 with an axial inside end slidably sleeved on the tension body 3 is sleeved on the axial inside portion of the truncated cone body 2, a plurality of slots 6 axially extending inwards are opened on the axial outside end of the sleeve 5, a plurality of first elastic bodies 7 are connected between the sleeve 5 at the axial innermost end and the anchoring end 1, a plurality of second elastic bodies 8 are connected between the other sleeve 5 and the truncated cone 2 on the inner side in the axial direction.

The utility model discloses an anchor hole 9, including the slotted axle, the slotted axle is to the sleeve pipe of inside circumference arrangement division has a plurality of first injected holes 16, the radial inboard of sleeve pipe is fixed with the cyclic annular slip casting chamber 17 that covers on first injected hole 16, cyclic annular slip casting chamber 17 intercommunication has the other end to stretch out the outer first slip casting pipe 18 of anchor hole 9, the radial outside of sleeve pipe is fixed with the cyclic annular first elasticity utricule 19 that covers on first injected hole 16, it has the cyclic annular first holding tank 20 corresponding with first elasticity utricule 19 to open in the anchor hole 9.

Preferably, the anchoring end 1 includes a cylinder 21, a grouting chamber 22 is formed inside the cylinder 21, a plurality of second grouting holes 23 communicated with the grouting chamber 22 are formed on an outer circumferential surface of the cylinder 21, a second annular elastic bag body 24 covering the second grouting holes 23 is fixed on the outer circumferential surface of the cylinder 21, a second annular accommodating groove 25 corresponding to the second elastic bag body 24 is formed in the anchoring hole 9, and a second grouting pipe 26 having the other end extending out of the anchoring hole 9 is communicated with the grouting chamber 22. Where the second grouting pipe 26 passes out of the anchor eye 9 by passing through the hole. During anchoring, grout is injected into the grouting chamber 22 through the second grouting pipe 26, the grout in the grouting chamber 22 is filled into the second elastic bag body 24 through the second grouting holes 23, the second elastic bag body 24 is continuously expanded along with the grouting, and the second elastic bag body 24 can be made of elastic rubber. The second elastic bag 24 expands into the corresponding second receiving groove 25, and grouting is stopped when the second receiving groove 25 and the grouting chamber 22 are filled. The anchoring mode fills grout into the preset cavity in the side wall of the anchor hole 9 and the cylinder 21, so that the anchor hole 9 and the cylinder 21 form an integral anchoring structure, the anchoring acting force is greatly increased, the structure skillfully utilizes the expansion characteristic of the elastic bag body, and concrete is controllably injected into the preset cavity in the side wall of the anchor hole 9, so that the concrete is effectively prevented from flowing randomly, and the anchoring mode is strong in operability and convenient to construct. The first elastic body 7 is fixed to the end face of the cylindrical body 21. The tension body 3 is fixed on the end face of the cylindrical body 21.

Preferably, said first elastic balloon 19 is fitted with an inherent grouting guide disc 27 on an axially internal sleeve.

When the conical anchoring head is used, grouting is only needed at the bottom of the anchor hole, and the conical anchoring head is covered under the grout, which is the prior art and is not described herein again. The through hole for the grouting pipe to pass through is opened on the outer circumferential surface of the tension body to communicate with the inner cavity thereof, so that the grouting pipe can pass through the through hole, the through hole of the tension body extends upward to the outside of the anchor hole, and of course, at the position where a plurality of tension bodies are stacked, the through hole passes through between the outer circumferential surface of the outermost tension body and the inner circumferential surface of the innermost tension body. The tray 11 is also provided with a through hole for passing the first and second grouting pipes 18 and 26.

After the anchor hole 9 is drilled at the anchor point, the invention is installed, and taking two-stage anchoring as an example, the first-stage screw 10 is fixed at the anchor end 1. The first stage casing 5 is fitted over the first stage tension body 3 from the axially inner end toward the axially outer end of the first stage tension body 3, then the second stage casing 5 is fitted over the second stage tension body 3 from the axially inner end toward the axially outer end, and then the second stage tension body 3 is passed out toward the axially inner end through the through holes 4 of the first stage tension body 3 toward the axially inner end. The first stage of the tension body 3 and the sleeve 5 are then moved towards the axially outer end, exposing the axially inner end of the second stage of the tension body 3 and fixing it to the anchoring end 1. Then, the first-stage tension body 3 is fixed at the anchoring end 1, a plurality of first-stage springs are uniformly distributed between the first-stage sleeve 5 and the anchoring end 1, and a plurality of second-stage springs are uniformly distributed between the first-stage cone 2 and the second-stage sleeve 5.

Then anchoring the anchoring end 1 at the bottom of the anchoring hole 9, facing the first elastic bag body 19 to the first accommodating groove 20 in the anchoring hole, then grouting through the first grouting pipe 18, wherein the grout enters the annular grouting cavity 17 through the first grouting pipe 18, the grout is injected into the first elastic bag body 19 from the annular grouting cavity 17 through a plurality of first grouting holes 16, the first elastic bag body 19 can be made of elastic rubber, then the first elastic bag body 19 expands outwards, preferably, a grouting guide disc 27 is arranged at the lower part of the first elastic bag body 19, the first elastic bag body 19 can be expanded and guided, along with the continuous injection of the grout, the first elastic bag body 19 gradually expands and enters the first accommodating groove 20, grouting is continued until the first elastic bag body 19 is filled with the first accommodating groove 20 and the annular grouting cavity 17, grouting is stopped, after the grout is solidified, the anchoring between the first elastic bag 20 and the annular grouting cavity 17 through the plurality of first grouting holes 16 is formed, this is injection point two 14. The anchoring mode ensures that the concrete extends into a cavity preset in the side wall of the anchor hole 9 and the sleeve 5 to form an integral anchoring body. And the expansibility of the elastic bag body is skillfully utilized, so that the concrete is effectively prevented from flowing randomly, and the concrete is enabled to face a specific guide direction for grouting and forming an anchoring body so as to achieve the required shape and state. Therefore, the sleeve 5 and the rock-soil body in the anchor hole are tightly anchored together, and the solidified cavity and the concrete in the anchor hole form an integral anchoring structure by being distinguished from the friction resistance action of grouting between the anchor hole 9 and the sleeve 5, so that the limitation of anchoring only by friction force in the prior art is broken through. In addition, the invention greatly avoids the disturbance of the traditional grouting on the peripheral rock-soil mass, reduces the reduction of the strength of the rock-soil mass caused by the water physical effect of the rock-soil mass after encountering grout, and further effectively exerts the strength of the rock-soil mass.

And grouting the anchor hole 9 at the position of the slot 6 to thicken the side wall of the anchor hole 9, wherein the grouting point is three 15, so that the side wall of the anchor hole 9 can be attached to the side wall of the sleeve 5 at the position of the slot 6. Thus, when a rock mass at the position of the sleeve 5 of a certain grade deforms, the sleeve 5 axially inside the slot 6 at the position is fixedly connected with the anchor hole 9, the rock mass at the position deforms to drive the corresponding sleeve 5 to axially move outwards, the sleeve 5 axially moves outwards to be matched with the truncated cone 2, the sleeve 5 at the position of the slot 6 radially expands outwards, the sleeve 5 at the position of the slot 6 is tightly attached to the anchor hole 9, the pressure on the side wall of the anchor hole 9 is continuously increased in the expanding process of the sleeve 5, the sleeve 5 is more tightly fixed in the anchor hole 9, the sleeve 5 is prevented from further moving upwards by the inner truncated cone 2, the truncated cone 2 is fixed on the anchoring end 1 at the bottom through the tension body 3, the anchoring end 1 is formed to prevent the tension body 3 from axially moving outwards, the tension body 3 prevents the truncated cone 2 from axially moving outwards, the truncated cone 2 prevents the sleeve 5 from axially moving outwards, The sleeve 5 further resists the rock mass from moving axially outwards by increasing the friction with the anchor eye 9 by continuing to expand radially outwards in cooperation with the cone 2. Finally, the anchoring effect is achieved.

The stress parts in the invention are all in the anchor hole 9, and can not be exposed to wind and sunshine for a long time, and the internal environment of the anchor hole 9 is better than the environment outside the anchor hole 9, thereby prolonging the service life of the anchoring equipment. The anchoring in the invention is multi-stage anchoring, and the rock mass at which stage is deformed can be detected by detecting the stress degree of the tension body 3 at different stages, so that the monitoring and the research on the rock mass deformation are convenient.

When the rock mass at the first stage of the axial inner part is deformed, all rock masses at the outer part of the deformation have the tendency to move because the axially innermost rock mass is deformed, and therefore all the tension bodies 3 at all stages are stressed. The outer rock mass is also heavier at this time and therefore all tension bodies 3 will simultaneously be subjected to the weight tension of the heavier rock mass, while when the rock mass at a certain level is deformed, the axially inner tension body 3 of that level is not stressed at this time, and all tension bodies 3 axially outside it are stressed. By adopting the structure, the rock mass with heavier outside has more tension bodies 3 to control and bear, the rock mass with lighter inside has less tension bodies 3 to control and bear, so that the self-adaption is flexible, the anchoring strength is enhanced, the self-adaption is strong, and each tension body 3 can play the role required by the tension body. And not every time every stage of the tension body 3 is active, the life of the tension body 3 is invisibly enhanced.

Embodiment 2, on the basis of embodiment 1, a screw 10 is fixed at the center of the anchoring end 1, the screw 10 penetrates through the through hole 4 in the axially outermost circular truncated cone 2 towards the axial outside, a tray 11 is sleeved on the part of the screw 10 penetrating through the axially outermost circular truncated cone 2, and a nut 12 is screwed on the screw 10 on the axially outside of the tray 11. The screw 10 is fixed on the end face of the cylinder 21.

In this embodiment, a screw 10 is added, that is, a conventional anchoring manner, and a protection level is added, which may be set according to the situation, the screw 10 is fixed at the center of the anchoring end 1, then the axial outer end of the screw 10 extends out of the anchoring hole 9, a tray 11 is sleeved on the screw 10 to press against the rock sidewall outside the anchoring hole 9, and then a nut 12 is sleeved on the screw 10 axially outside the tray 11. The nut 12 can, in an initial state, press against the tray 11, directly constituting another level of anchoring. It can also be kept a certain distance from the tray 11 as a precaution anchor, when the rock mass deforms to a certain extent, it brings the tray 11 into contact with the nut 12 to form an anchor. One more level of anchoring enhances the security of the anchoring.

Embodiment 3, on the basis of embodiment 1, the anchoring end 1 is anchored at the axial inner end of the anchoring hole 9, the side wall of the sleeve 5 axially inside the slot 6 is anchored in the anchoring hole 9, and the inner wall of the anchoring hole 9 at the slot 6 is attached to the sleeve 5.

The arrangement is that when the side wall of the anchor hole 9 moves, the sleeve 5 is driven to have a trend of moving outwards in the axial direction, the sleeve 5 is matched with the circular truncated cone body 2 to enable the axial outer portion of the sleeve 5 to have an opening trend, the sleeve is tightly adhered to the side wall of the anchor hole 9 after being opened, the increased expansion force prevents the side wall of the anchor hole 9 from moving towards the axial outer portion, the more the sleeve moves outwards, the larger the gripping resistance is, the tighter the gripping resistance is, and the whole anchoring failure caused by the fracture of the sleeve 5 and the anchor hole 9 which are arranged in the axial inner portion of the slot 6 in the rock body moving process is prevented.

Example 4, in example 1, both the first elastic body 7 and the second elastic body 8 are springs.

The function of the spring is to keep the casing 5 connected to its lower connection without affecting the upward movement of the casing 5 with the rock mass.

In example 5, the truncated cone 2 and the tension body 3 are integrated in example 1.

The truncated cone 2 and the tension body 3 may be integrally cast. The sleeve 5 material may be carbon steel expansion pipe of expansion screw. The radially outer portion of the sleeve 5 at the slot 6 may be provided with a plurality of friction protrusions for increasing the friction with the side walls of the anchoring hole 9.

Example 6, on the basis of example 1, the tension bodies 3 other than the axially innermost tension body 3 each include an insertion portion 301 inserted through the hole 4, a transition portion 302 integrally connected to the axially outer end of the insertion portion 301, the diameter of the axially outer end face of the transition portion 302 being equal to the diameter of the axially outer end of the axially innermost tension body 3, and the axially outer end of the transition portion 302 being connected to the truncated cone 2.

This arrangement allows the axially inner insertion portion 301 to be smaller in diameter for insertion into the through-hole 4, while the transition portion 302 facilitates the integral casting of the truncated cone 2 in order to enlarge the diameter of the tension body 3 to be consistent with the axially innermost tension body 3, ensuring that the size of the truncated cone 2 is consistent for a plurality of stages. And the diameters of the two parts are naturally transited without shaft shoulders, so that the stress degree of the parts is enhanced. The same truncated cone 2 ensures the same size of the sleeve 5. The sleeve 5 and the circular truncated cone 2 in the same size are matched, so that the production is convenient, the installation standards of the side walls of the anchor holes 9 are consistent, and the action effect is consistent.

In embodiment 7, in addition to embodiment 6, the transition portion 302 has a truncated cone shape with a small inside and a large outside in the axial direction.

The axially inner end of the sleeve is fixed with a radially inwardly extending slip ring 13 which is a sliding fit on the tension body. The slip ring 13 allows the axially inner end of the sleeve to be vertically slidably connected to the tension body.

Claims (9)

1. A multistage expansion capsule anchoring device comprises an anchoring end (1), and is characterized in that a plurality of truncated cone bodies (2) which are axially large outside and small inside are arranged at intervals on the axially outer side of the anchoring end (1), a tension body (3) is coaxially connected with the axially inner end of each truncated cone body (2), a through hole (4) which axially penetrates through the tension body (3) inwards is formed in the axially outer end of each truncated cone body (2), the tension body (3) at the axially innermost end is fixed on the anchoring end (1), the tension body (3) at the axially outer side penetrates through the truncated cone bodies (2) adjacent to the axially inner side of the truncated cone body and the through hole (4) in the tension body (3) to be fixed on the anchoring end (1), a sleeve (5) which is slidably sleeved on the tension body (3) at the axially inner end is sleeved on the axially inner portion of each truncated cone body (2), and a plurality of slots (6) which extend towards the axially inner portion are formed in the axially outer end of each sleeve (5), a plurality of first elastic bodies (7) are connected between the sleeve (5) at the innermost end in the axial direction and the anchoring end (1), and a plurality of second elastic bodies (8) are connected between the other sleeves (5) and the truncated cone body (2) at the inner side in the axial direction;

the utility model discloses a construction method, including the anchor hole 9, the annular first holding tank (20) that has a plurality of first injected holes (16) are arranged to circumference on the sleeve pipe of fluting axle inside to, the radial inboard of sleeve pipe is fixed with covers annular grouting chamber (17) on first injected hole (16), annular grouting chamber (17) intercommunication has the other end to stretch out the outer first slip casting pipe (18) of anchor hole 9, the radial outside of sleeve pipe is fixed with the annular first elasticity utricule (19) that covers on first injected hole (16), it has corresponding annular first holding tank (20) with first elasticity utricule (19) to open in the anchor hole 9.

2. The multistage expansion capsule anchoring device according to claim 1, wherein a screw rod (10) is fixed in the center of the anchoring end (1), the screw rod (10) penetrates through the through hole (4) in the circular truncated cone body (2) at the outermost axial end towards the axial outer side, a tray (11) is sleeved on the part of the screw rod (10) penetrating through the circular truncated cone body (2) at the outermost axial end, and a nut (12) is screwed on the screw rod (10) at the outer axial side of the tray (11).

3. A multistage inflatable balloon bolting device according to claim 1, wherein said anchoring end (1) is anchored at an axially inner end of an anchor hole (9), the side wall of the sleeve (5) axially inside said slot (6) is anchored in the anchor hole (9), and the inner wall of the anchor hole (9) at said slot (6) is against the sleeve (5).

4. The multistage inflatable balloon anchor device according to claim 1, wherein the first elastic body (7) and the second elastic body (8) are both springs.

5. The multistage inflatable bladder bolting device according to claim 1, wherein said cone (2) and said tension body (3) are of one-piece construction.

6. A multistage inflatable bladder bolting device according to claim 1, characterised in that the tensioners (3) outside the axially innermost tensioner (3) each comprise an insertion part (301) inserted through the hole (4), a transition part (302) integrally connected to the axially outer end of the insertion part (301), the axially outer end surface diameter of said transition part (302) being equal to the axially outer end diameter of the axially innermost tensioner (3), and the axially outer end of said transition part (302) being connected to the truncated cone (2).

7. The multistage expanding balloon bolting device according to claim 6, wherein said transition portion (302) is in the form of a truncated cone with a small inner portion and a large outer portion.

8. The anchoring end 1 of the multistage inflatable balloon anchoring device according to claim 1, wherein the cylinder (21) is provided with a grouting chamber (22) inside, the outer circumferential surface of the cylinder (21) is provided with a plurality of second grouting holes (23) communicated with the grouting chamber (22), the outer circumferential surface of the cylinder (21) is fixed with a second annular elastic balloon (24) covering the second grouting holes (23), the anchoring holes 9 are provided with second annular accommodating grooves (25) corresponding to the second elastic balloon (24), and the grouting chamber (22) is communicated with a second grouting pipe (26) with the other end extending out of the anchoring holes 9.

9. A multistage inflatable balloon bolting device according to claim 1, said first elastomeric balloon (19) being sleeved with a grout guide (27) on an axially inner sleeve.

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